The invention relates to the field of workpiece
machining, and discloses a workpiece surface
trepanning device which comprises a
workbench, a containing groove is formed in the top face of the
workbench, a discharging hole is formed in the inner bottom face of the containing groove, a sliding groove is formed in the rear side of the
workbench, and a
dust collector is fixed to the inner wall of the discharging hole. A sliding groove is formed in the top face of the workbench, a collecting box is slidably arranged on the inner wall of the sliding groove and connected with a
dust collector through a pipeline, a fixing
assembly is arranged on the inner wall of the containing groove, a placing plate is fixed to the inner wall of the containing groove, and a driving
assembly is slidably arranged on the top face of the workbench. According to the aluminum
scrap removing device, through cooperation of the
dust collector, the draught fan and the scraping plate, aluminum scraps generated during workpiece drilling and after drilling can be effectively removed, the quality problems that the surfaces of drilled holes are not smooth or the hole diameters are not uniform and the like due to the fact that the scraps generated during drilling remain around the drilled holes or in the drilled holes are effectively solved, and therefore the scraps can be collected, recycled and reused.